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Derivatives - Gains (Losses) Included in the Consolidated Statements of Income Related to Derivative Financial Instruments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Derivatives, Fair Value [Line Items] |  |  |
Reclassification adjustment for gain on hedging activities, tax | $ 337 | $ 170 | $ 45
Amount of (loss) gain recognized in other comprehensive income | (1,031) | (914) | 1,039
(Loss) gain recognized in other comprehensive income, expense (benefit), tax | 363 | 322 | (366)
Not designated as hedging: | Mortgage Banking Income |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Gains (losses) on derivative financial instruments | (37,543) | 3,288 | 298
Designated as hedging: |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Total cash flow hedge gain (loss) and derivative excluded component increase (decrease) | 602 | 596 | 160
Designated as hedging: | Interest Expense on Borrowings |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Amount of gain (loss) reclassified from other comprehensive income and recognized in interest expense on borrowings | 955 | 481 | 128
(Loss) gain included in interest expense on borrowings | (353) | 115 | 32
Interest rate-lock commitments | Not designated as hedging: | Mortgage Banking Income |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Gains (losses) on derivative financial instruments | 27,339 | (2,112) | (527)
Forward commitments | Not designated as hedging: | Mortgage Banking Income |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Gains (losses) on derivative financial instruments | (73,033) | 12,170 | 3,864
Futures contracts | Not designated as hedging: | Mortgage Banking Income |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Gains (losses) on derivative financial instruments | 8,151 | (6,723) | (2,981)
Option contracts | Not designated as hedging: | Mortgage Banking Income |  |  |
Derivatives, Fair Value [Line Items] |  |  |
Gains (losses) on derivative financial instruments | $ 0 | $ (47) | $ (58)

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- Definition Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification Before Tax And Derivative, Excluded Component Increase (Decrease Before Adjustments And Tax + References No definition available. + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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- Definition Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121577181&loc=SL110061190-113977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 + Details
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- Definition Amount, before tax and adjustments, of gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (dd) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CCC -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL109998896-113959 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=121577181&loc=SL110061190-113977 + Details
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